html,body {
    /*min-height: 100%;*/
    /*display: flex;*/
    /*flex-direction: column;*/
    height: 100%;
    background-color: rgb(41,42,45);
    font-family: "Helvetica Neue",Helvetica,Arial,sans-serif;
    /*font-size: 14px;!**!*/
    line-height: 1.42857143;

    /*background-color: #88ccff;*/
    background: url("../image/img_6.png") center/cover;
    background-attachment: fixed; /* 这是关键，让背景图片固定不移动 */
    /*background-position: center;*/
    /*background-size: cover;*/
    /*height: 100%;*/
}

.all {
    height: 100%;
    /*position: relative;*/
    display: flex;
    flex-direction: column;
}

.content-all0 {
    flex: 1;
}

/*.footer {*/
/*    position: absolute;*/
/*    bottom: 0;*/
/*    left: 0;*/
/*    right: 0;*/
/*    margin: 0;*/
/*}*/





